5:12 Therefore, as sin came into the world through one man, and death as the result of sin, so death spread to all men, [no one being able to stop it or to escape its power] because all men sinned.

5:13 [To be sure] sin was in the world before ever the Law was given, but sin is not charged to men’s account where there is no law [to transgress].

5:14 Yet death held sway from Adam to Moses [the Lawgiver], even over those who did not themselves transgress [a positive command] as Adam did. Adam was a type (prefigure) of the One Who was to come [in reverse, the former destructive, the Latter saving].

If you are born into this world, you have the adamic sinful nature in your body, though you are a living being, able to eat, and drink if you have not accepted CHRIST as LORD, MASTER and SAVIOR, you are dead (death - means separated from GOD)

B. The Last Adam - JESUS - life-giving Spirit

"the last Adam (Christ) became a life-giving Spirit [restoring the dead to life]"

5:21 So that, [just] as sin has reigned in death, [so] grace (His unearned and undeserved favor) might reign also through righteousness (right standing with God) which issues in eternal life through Jesus Christ (the Messiah, the Anointed One) our Lord.

We have enjoyed here on earth the eternal life GOD has for us, and it's in our relationship and continuous experiential knowledge of the LORD JESUS CHRIST.